Hey arctic-kid, You need some terminology for the sleds... :smilielol:
Boondockers- Boondockers are snowmobilers in the mountains that ride off of main trails & in the back woods. They go Boondocking (or riding in the Boondocks, meaning back country).
Boondocker- Boondocker is a company that makes EFI control boxes & Nitrous spray kits for snowmobiles & ATV's.
Highmarking- Mountain riders go up a large hill or mountain at steep inclines. They try to outride each other by making a higher mark on the mountain face with their sled. By going higher than the previous rider, they are highmarking them. ...get it?
That is just some useful terminology for ya. What you are asking about (I think?) is a control box for your EFI (electronic Fuel injected) engine. correct?
IMO (In My Opinion) Boondocker is the best right now. I have it on my sled & it lets me add fuel & air in large quantities...enough for my big bore.
This concludes snowmobiling 101 class #22 :drunk: